Notices

GPS Talk GPS Hardware and Software discussion

Reply
 
LinkBack Thread Tools
Old 02-22-04, 09:15 PM   #1 (permalink)
Aximsite Major League
 
suemccartin's Avatar
Senior Member
 
Join Date: Sep 2003
Location: Florida
Posts: 338
Thanked 0 Times in 0 Posts
GPS has lost its mind HELP!

Hi All
I just got back from a rather frustrating trip using mapopolis 4.37 for navigation with my axim x5 advanced. To give a little history here, I WASN'T having any problems with my axim x5 or mapopolis until last week when I got my new fortuna pocket Xtrack CF gps and put it on the setup, the Fortuna was losing/getting fix about four times in a row before it could maintain fix. I sent the Fortuna back to semsons thinking there was a problem with it; they just wrote me to say they couldn't reproduce the problem I was seeing. At first I didn't have any problems with my older holux gm-270 but then suddenly it started doing the same thing the fortuna was doing.

So on to the hassle on the trip. I normally have the entire state of Florida Maps available to the program--this has never been a problem on any other trip I've taken with it in more than one state with versions earlier than 4.37. On my way outbound, I had more than a few fix losses, it seemed to me like it was happening whenever I crossed a map boundary and there was a LOT of map float even when it was showing my position correctly. Fortunately I was able to get to my destination despite turning around a couple of times when I was really going in the right direction but had no fix. It was more than a bit annoying to be on a lonely state road at 2 am in total darkness other than my headlights and not have more than an inkling where the heck I was!!!

The trip back was another matter entirely. I had problems getting a fix in the middle of ocala national forest, I drove to the little town of Eustis and messed around with soft resets, hard resets etc for more than an hour and was not able to get it to set a route. If I got a fix at all it lost it the second I programmed a destination. Well, being alot miffed, I pulled out the Florida map and managed to find 75 and get home.

When I got home I yanked version 4.37 off the machine and loaded up 4.33, I went outside in my driveway and tried to get a fix. It again did the fix/loss dance for a few minutes and now it doesn't at all point to my correct position--and I mean not at all, I don't even recognize where it says I am! I don't think it's even in Pinellas County.

So what is this? Some kind of weird corrupted map file problem? Or could this be an infamous SanDisk SD card failure of some weird variety. Everything else on the card seems to be ok. I've got a 256 Panasonic card for my camera, I think I'm going to reload everything onto that and test again, if it continues I'll try reloading all the maps fresh from my hard drive.

If anyone's seen anything like this before please tell me what you did to resolve it. I've seen a couple of posts about "resetting" a CF gps when it gets into some weird mode. I used the holux gps viewer and told it to do a cold start several times and the two boxes (power save, waas/egnos)are clear in that program. I also tried cruxview but that one doesn't make any sense to me, I'll need some instructions for that one apparently. HELP!!! This is just too weird.


Further note: Tried fresh off the hard disk maps on a different sd card, no change. So it's either the axim or the gps, seems funny that two different cf gps units could be having a nearly identical malfunction but it's also just too wierd to be a problem with the axim either because everything else seems to be working. HELP, IF ANYONE'S GOT ANY IDEAS I WANT TO HEAR THEM, waaahhh I wanted to use it on my trip in two weeks I don't have time to send the axim back for repair. When I get time I'll dig out my old maestro and see what happens on it.

Last edited by suemccartin; 02-23-04 at 11:56 AM.
suemccartin is offline   Reply With Quote
Sponsor Ads
Old 02-26-04, 03:06 PM   #2 (permalink)
Aximsite Major League
 
suemccartin's Avatar
Senior Member
 
Join Date: Sep 2003
Location: Florida
Posts: 338
Thanked 0 Times in 0 Posts
I think I found the solution to this one....

Well after much cursing and messing around I finally found out that if GPS signals are being degraded, unreliable, etc. The FAA will issue a NOTAM advisory. All you need is the three letter airport code for your local airport to look up advisories, there is also a utility on the FAA site that will bring up all NOTAM advisories for a given radius. Even though Tampa International Airport and St. Pete Clearwater didn't have a NOTAM for gps signals I found one for Jacksonville and Miami.

NOTAM advisories can be found here:
https://pilotweb.nas.faa.gov/distribution/atcscc.html

If you don't know the 3 letter code for your local airport you can obtain it from someplace like cheaptickets.com or travelocity.com.

I hope this helps someone.
suemccartin is offline   Reply With Quote
Reply

Sponsor Ads

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 12:22 PM.
Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.0
Copyright © 2003-09 LeckMedia, LLC